CN103556628B - Spiral conical soil compaction pile construction method - Google Patents
Spiral conical soil compaction pile construction method Download PDFInfo
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- CN103556628B CN103556628B CN201310570537.7A CN201310570537A CN103556628B CN 103556628 B CN103556628 B CN 103556628B CN 201310570537 A CN201310570537 A CN 201310570537A CN 103556628 B CN103556628 B CN 103556628B
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- 239000002689 soil Substances 0.000 title claims abstract description 109
- 238000005056 compaction Methods 0.000 title claims abstract description 60
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 230000002457 bidirectional effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000003094 perturbing effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- 239000004576 sand Substances 0.000 description 1
- -1 silt Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- Earth Drilling (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The present invention relates to spiral conical soil compaction pile construction method and screw cone soil compaction drill bit.Be that one is directly carried out squeezed at rock-soil layer, avoid because stability squeezed between DIFFERENT SOIL layer is bad, cause in stake holes and collapse.Pore-forming of the present invention is by high pulling torque unit head, water booster system, standard drill pipe and screw cone soil compaction drill bit, turn clockwise downwards and creep into, lower part cone structure in screw cone soil compaction drill bit directly carries out squeezed boring at rock-soil layer, it is main soil compaction part, upper part column structure carries out auxiliary soil compaction, ensures not collapse in aperture and hole; Upwards during up time rotary lifting, the hole of drill bit upper part column structure to squeezed one-tenth is carried out again squeezed, prevents undergauge.Promote simultaneously upper revolving, start concrete pump to guncreting pile material in stake holes.Method bearing capacity of the present invention is higher, settling amount is less, quality of pile is better, cost is lower, energy consumption is less, work efficiency is higher, environmental protection more, and can under various geological conditions construction operation.
Description
Technical field
The present invention relates to a kind of in field of civil engineering, for becoming spiral conical soil compaction pile construction method and the screw cone soil compaction drill bit of pile foundation.
Background technology
In construction foundation working field, the piling method of pile foundation, can be divided into displacement pile and non displacement pile.
Displacement pile is as long spire CFG, and the construction methods such as Churn drill and abrasion drill reverse circulation, have formed pile capacity low, cost is high, the shortcomings such as cleaning casting and discarded slurry expense height.
Non displacement pile has preformed pile and the large class of present walling pile two.Preformed pile has manufacturing equipment costliness, and cost of production is high, and pile body is long, transport difficult, is only applicable to the shortcoming such as Soft Soil Layer and paxilla footpath.Present walling pile has screw rod pile and bidirectional helix extruding-enlarging stake.Screw rod pile requires that the technology of pile-forming equipment synchronism control is high, for the uncertainty and the heterogeneity that have soil layer and soft or hard change, be difficult to ensure not perturbing of pile ground thread, false thread can be formed, reduce the bearing capacity of stake, and cannot firm hard formation be applied to.The hole forming method that bidirectional helix extruding-enlarging stake is squeezed after adopting subdrilling, in backspin drilling process, utilize bidirectional helix extruding enlarging aiguille middle column body augers part by soil body rotary drill out, and be from bottom to top transported to cone core tube portion by helical blade, gradually the soil body is clamp-oned stake holes sidewall by cone core pipe, the subject matter existed first is revolved by soil to dig out upwards to transport to extrude to the pile lining of both sides more again, therefore for more complicated stratum as clay layer and folder layer of gravel, rotary drill out ground can block the trafficking pathways that helical blade formed, easy generation bit bouncing phenomenon, due to the difference on stratum, after subdrilling, squeeze the stake holes that formed, often at original place layer and be extruded poor stability between the soil body, there will be slump phenomenon, seriously understand bury drills.
Summary of the invention
The object of this invention is to provide a kind of formation of pile and do not revolve the direct squeezed pile of soil, formed pile capacity is high, settling amount is little, quality of pile good, cost is low, less energy consumption, work efficiency is high, not easily bit bouncing, environmental protection, various complex random systems can be penetrated, and can under various geological conditions the spiral conical soil compaction pile construction method of construction operation.
Another object of the present invention is to provide a kind of screw cone soil compaction drill bit being applicable to spiral conical soil compaction pile construction method of the present invention.
The technical solution used in the present invention is: spiral conical soil compaction pile construction method, comprises the steps:
One, driller insertion, screw cone soil compaction drill bit align piles position;
Two, pressurize: the unit head and the pressurization hoist engine that start rig, clockwise moment of torsion and pressure are straight down applied to standard drill pipe and screw cone soil compaction drill bit, screw cone soil compaction drill bit is utilized to carry out creeping into squeezed hole, in lower spiral expanded finished hole process, the soil body is not by rotary drill out, directly radial on the lower side squeezed to the soil body by the screw cone structure division of screw cone soil compaction drill bit, the borded pile body structure of screw cone soil compaction drill bit, carries out secondary extrusion by the stake holes wall of cylinder blade to squeezed one-tenth;
Three, promote: by unit head and the lifting hoist engine of rig, clockwise moment of torsion and pulling force are straight up applied to standard drill pipe and screw cone soil compaction drill bit, the borded pile body structure part of screw cone soil compaction drill bit extrudes again to the stake holes become, and is promoted to earth's surface until revolve on drill bit is steady; Start concrete pump in the process, concrete pours into design of pile top absolute altitude stake holes through hollow drill pipe and drill bit.
Method of the present invention, also comprises and inserts in Squeezing Soil Pile by vibrator by reinforcing cage, completes the construction of screw cone soil compaction drill bit Squeezing Soil Pile.
In the present invention, coupling unit head nominal torque is 350 ~ 450KNm, and rotating speed is 4 ~ 12r/min, and pressurization and lifting force are respectively 300 ~ 400KN and 700 ~ 800KN, and backspin rate of penetration is 0.5 ~ 3.5m/min.
For a screw cone soil compaction drill bit for above-mentioned spiral conical soil compaction pile construction method, by borded pile body structure and screw cone Structure composing integrative-structure; Described borded pile body structure is that cylinder core pipe one end is provided with bit adapter, and cylinder core pipe outer rim is provided with spiral cylinder blade; Described screw cone structure be cone core pipe lower end by pinned connection drill bit door, the outer rim of cone core pipe is provided with screw cone blade.
Above-mentioned screw cone soil compaction drill bit, spiral cylinder blade is evenly provided with some breach.
Above-mentioned screw cone soil compaction drill bit, the cross section of spiral cylinder blade is quadrangle, and the angle of two sides and cylinder core pipe is respectively φ=45 ~ 50 °, ω=65 ~ 70 °.
Above-mentioned screw cone soil compaction drill bit, the tapering of cone core pipe is α=5 ~ 8 °.Described tapering refers to the angle between the sidewall of cone core pipe and central axis.
Above-mentioned screw cone soil compaction drill bit, the cross section of screw cone blade is quadrangle, and the angle of two sides and cone core pipe is respectively β=65 ~ 70 °; γ=55 ~ 60 °.
Above-mentioned screw cone soil compaction drill bit, the distance H=350 ~ 420mm between spiral cylinder blade, distance h=(0.7 ~ 0.8) H between screw cone blade.
The invention has the beneficial effects as follows: 1. technical advantage: pile quality is reliably controlled, stake side and pile-end soil body squeezed, inter-pile soil body has layer compaction effect, and pile capacity is high, settling amount is little, and pile efficiency is high.2. cost advantage: it is high that stake monomer amasss bearing capacity, pile efficiency is high, not casting, saves concrete amount.3. environment-friendly advantage: without the outer pollution discharging of mud, without dregs outward transport, without construction fugitive dust, do not need to deposit soil site, pile noiselessness, friction, save concrete raw material.4. applied widely: suitable soil layer comprises Muddy Bottoms clay, cohesive soil, silt, sand, containing little gravel cohesive soil, loess and severely-weathered soil etc., can be widely used in traffic engineering, Industrial and Civil Engineering field.5. method of the present invention is in lower spiral expanded finished hole process, the screw cone structure division of screw cone soil compaction drill bit is to the direct radial squeezed hole on the lower side of the soil body, having stopped bidirectional helix extruding-enlarging stake in prior art creeps in squeezed hole process, the soil body first by rotary drill out, above being transported to by helical blade more progressively squeezed again and between the different rock-layers soil body caused extrusion stability poor, and there is hole phenomenon of collapsing.Also stopped bidirectional helix extruding-enlarging stake creeps in squeezed hole process simultaneously, by the rotary drill soil body out in complex formation, is blocked by gravel, mud stone etc. in passive movement frequent in helical blade from bottom to top process for the helical movement, produces bit bouncing phenomenon.6. the column structure of screw cone soil compaction drill bit, carries out secondary extrusion by the stake holes wall of cylinder blade to squeezed one-tenth.Select the length of column structure according to different rock-layers, longer column structure is selected in undergauge rock stratum bigger than normal, guarantees that the stake holes of squeezed one-tenth meets designing requirement, until stake holes projected depth.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of spiral cylinder blade.
Fig. 3 is the top view of spiral cylinder blade.
Fig. 4 is the structural representation of screw cone blade.
Fig. 5 is the top view of screw cone blade.
Fig. 6 is spiral cylinder blade surface earth stress schematic diagram.
Fig. 7 is spiral cylinder blade breach surface earth stress schematic diagram.
Fig. 8 is screw cone core tube-surface earth stress schematic diagram.
Fig. 9 is screw cone blade surface earth stress.
Detailed description of the invention
embodiment 1 spiral conical soil compaction pile construction method
(1) screw cone soil compaction drill bit
As shown in Figure 1, screw cone soil compaction drill bit, is integrally formed structure by borded pile body structure (10) and screw cone structure (20).
Borded pile body structure (10) is: cylinder core pipe (11) one end is provided with bit adapter (12), and cylinder core pipe (11) outer rim is provided with spiral cylinder blade (13).As Figure 2-3, spiral cylinder blade (13) is evenly provided with some breach (14).As shown in Figure 6, the cross section of spiral cylinder blade (13) is quadrangle, and the angle of two sides and cylinder core pipe (11) is respectively φ=45 ~ 50 °, ω=65 ~ 70 °.Spiral cylinder blade (13) is contour blade.Distance H=350 ~ 420mm between spiral cylinder blade (13).External profile diameter D=300 ~ the 700mm of borded pile body structure (10); Diameter d=(0.65 ~ 0.75) D of cylinder core pipe (11).
Screw cone structure (20) is: cone core pipe (21) lower end connects drill bit door (23) by bearing pin (22), and the outer rim of cone core pipe (21) is provided with screw cone blade (24).As shown in Figure 3-4, screw cone blade (24) is contour blade.As shown in Figure 8, the tapering of cone core pipe (21) is α=5 ~ 8 ° (tapering refers to the angle between the sidewall of cone core pipe and central axis).As shown in Figure 9, the cross section of screw cone blade (24) is quadrangle, and the angle of two sides and cone core pipe (21) is respectively β=65 ~ 70 °; γ=55 ~ 60 °.Distance h=(0.7 ~ 0.8) H between screw cone blade (24).
(2) spiral conical soil compaction pile construction method
1) driller insertion, screw cone soil compaction drill bit align piles position;
2) pressurize: the unit head and the pressurization hoist engine that start rig, clockwise moment of torsion and pressure are straight down applied to standard drill pipe and screw cone soil compaction drill bit, screw cone soil compaction drill bit is utilized to carry out creeping into squeezed hole, in lower spiral expanded finished hole process, the soil body is not by rotary drill out, directly radial on the lower side squeezed to the soil body by the screw cone structure division of screw cone soil compaction drill bit, the borded pile body structure of screw cone soil compaction drill bit, carries out secondary extrusion by the stake holes wall of cylinder blade to squeezed one-tenth;
3) promote: by unit head and the lifting hoist engine of rig, clockwise moment of torsion and pulling force are straight up applied to standard drill pipe and screw cone soil compaction drill bit, the borded pile body structure part of screw cone soil compaction drill bit extrudes again to the stake holes become, and is promoted to earth's surface until revolve on drill bit is steady; Start concrete pump in the process, concrete pours into design of pile top absolute altitude stake holes through hollow drill pipe and drill bit door.
(3) soil compaction principle of the present invention
When drill bit is crept into by high pulling torque unit head and water booster system and the clockwise backspin of standard drill pipe, in lower part screw cone structure, cone core pipe, cone blade and drill bit door are all doing the motion of radial soil compaction, make the soil body pressurized around drill bit and compacted, wherein have little a part of soil body to be transported to column structure part by cone blade.Due to jagged on cylinder blade, this part soil body again by cylinder blade pinches to stake holes inside wall.Revolve in lifting process on clockwise, in drill bit, the blade of borded pile body structure extrudes again to established stake holes, prevents undergauge; In lifting simultaneously, start concrete pump, make concrete by unit head, drilling rod central tube, until bottom drill bit, and press off drill bit door, be then injected in stake holes.Each several part soil-squeezing action is as follows:
As shown in Figure 6, three junior units getting cylinder blade three external surface soil bodys make force analysis, the unit soil body (30) is subject to P, Q, R tri-power effects respectively on three external surfaces, in these three power, P produces radial soil-squeezing action on the upper side to the soil body, Q produces radial soil-squeezing action to the soil body, and R produces radial soil-squeezing action on the lower side to the soil body.
As shown in Figure 7, get cylinder blade indentation, there plane and make force analysis to soil body junior unit, the soil body is subject to the effect of radial compression power T.
As shown in Figure 8, the junior unit getting the cone core tube-surface soil body makes force analysis, and the unit soil body is subject to the power F perpendicular to cone surface, and the soil body, under the effect of power F, extrudes to radial partial below, forms soil compaction effect.
As shown in Figure 9, the junior unit getting cone blade three external surface soil bodys makes force analysis, the power that three junior unit soil bodys are subject at three external surfaces is respectively G, M, N, power G makes the radial motion on the upper side of the soil body, power M makes the radial hyponastic of the soil body, power N makes the radial hyponastic of the soil body, and power G makes a small amount of soil body be moved upwards up to cylinder blade along cone blade, by cylinder blade pinches to stake holes inside wall.
In actual applications, each parameter value is adjusted according to different rock-soil layers.For sandy soils, β, φ value should be got greatly, and γ, ω value should be got less; For the clay layer that plasticity is larger, borded pile body structure length takes large values.
Claims (6)
1. spiral conical soil compaction pile construction method, is characterized in that step is as follows:
One, driller insertion, screw cone soil compaction drill bit align piles position;
Two, pressurize: the unit head and the pressurization hoist engine that start rig, clockwise moment of torsion and pressure are straight down applied to standard drill pipe and screw cone soil compaction drill bit, screw cone soil compaction drill bit is utilized to carry out creeping into squeezed hole, in lower spiral expanded finished hole process, the soil body is not by rotary drill out, directly radial on the lower side squeezed to the soil body by the screw cone structure division of screw cone soil compaction drill bit, the borded pile body structure of screw cone soil compaction drill bit, carries out secondary extrusion by the stake holes wall of cylinder blade to squeezed one-tenth;
Three, promote: by unit head and the lifting hoist engine of rig, clockwise moment of torsion and pulling force are straight up applied to standard drill pipe and screw cone soil compaction drill bit, the borded pile body structure part of screw cone soil compaction drill bit extrudes again to the stake holes become, and is promoted to earth's surface until revolve on drill bit is steady; Start concrete pump in the process, concrete pours into design of pile top absolute altitude through hollow drill pipe and drill bit door to stake holes;
Described screw cone soil compaction drill bit is: be integrally formed structure by borded pile body structure (10) and screw cone structure (20); Described borded pile body structure (10) is that cylinder core pipe (11) one end is provided with bit adapter (12), and cylinder core pipe (11) outer rim is provided with spiral cylinder blade (13), and spiral cylinder blade (13) is contour blade; Described screw cone structure (20) is that cone core pipe (21) lower end connects drill bit door (23) by bearing pin (22), and the outer rim of cone core pipe (21) is provided with screw cone blade (24), and screw cone blade (24) is contour blade.
2. spiral conical soil compaction pile construction method as claimed in claim 1, is characterized in that: spiral cylinder blade (13) is evenly provided with some breach (14).
3. spiral conical soil compaction pile construction method as claimed in claim 1, is characterized in that: the cross section of spiral cylinder blade (13) is quadrangle, and the angle of two sides and cylinder core pipe (11) is respectively φ=45 ~ 50 °, ω=65 ~ 70 °.
4. spiral conical soil compaction pile construction method as claimed in claim 1, is characterized in that: the tapering of cone core pipe (21) is α=5 ~ 8 °.
5. spiral conical soil compaction pile construction method as claimed in claim 1, is characterized in that: the cross section of screw cone blade (24) is quadrangle, and the angle of two sides and cone core pipe (21) is respectively β=65 ~ 70 °; γ=55 ~ 60 °.
6. spiral conical soil compaction pile construction method as claimed in claim 1, is characterized in that: the distance H=350 ~ 420mm between spiral cylinder blade (13), distance h=(0.7 ~ 0.8) H between screw cone blade (24).
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153712A (en) * | 2014-08-20 | 2014-11-19 | 中化岩土工程股份有限公司 | Pore-forming device for gravelly ground |
| CN106050150A (en) * | 2016-05-25 | 2016-10-26 | 煤炭科学技术研究院有限公司 | Reverse-spiral conical PDC drill bit capable of preventing hole collapse and used for soft rock drilling |
| CN106246099B (en) * | 2016-10-13 | 2018-06-01 | 刘守进 | The embedding rock device of spiral soil compaction down-the-hole and pile making method |
| CN106481277A (en) * | 2016-11-24 | 2017-03-08 | 刘泽华 | High pressure base expanding and base expanding screw rod drilling equipment and its stake end enlarged footing |
| CN107574818A (en) * | 2017-09-29 | 2018-01-12 | 浙江坤德创新岩土工程有限公司 | Screw, which bores, squeezes cast-in-place pile construction method and screw assemblies drill bit |
| CN109089474A (en) * | 2018-08-02 | 2018-12-28 | 盛世瑶兰（深圳）科技有限公司 | A kind of packaging type carries over the sea-buckthorn tree planting portable digger of track expansion |
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| CN1938497A (en) * | 2003-08-20 | 2007-03-28 | 雷西奥恩Utd公司 | Drilling apparatus, method, and system |
| CN201650119U (en) * | 2010-05-20 | 2010-11-24 | 中冶建筑研究总院有限公司 | Soil squeezing amount-adjustable bidirectional spiral squeezing and expanding bit |
| CN103174387A (en) * | 2013-01-24 | 2013-06-26 | 贺德新 | Construction method of soil squeezing and dumping drill rod, twist drill, pile machine, and soil squeezing and dumping pile |
| CN203201498U (en) * | 2013-01-24 | 2013-09-18 | 贺德新 | Soil compacting and discharging drilling rod, spiral drill and pile machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006241919A (en) * | 2005-03-07 | 2006-09-14 | Haseko Corp | Pile construction machine and pile construction method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1938497A (en) * | 2003-08-20 | 2007-03-28 | 雷西奥恩Utd公司 | Drilling apparatus, method, and system |
| CN201650119U (en) * | 2010-05-20 | 2010-11-24 | 中冶建筑研究总院有限公司 | Soil squeezing amount-adjustable bidirectional spiral squeezing and expanding bit |
| CN103174387A (en) * | 2013-01-24 | 2013-06-26 | 贺德新 | Construction method of soil squeezing and dumping drill rod, twist drill, pile machine, and soil squeezing and dumping pile |
| CN203201498U (en) * | 2013-01-24 | 2013-09-18 | 贺德新 | Soil compacting and discharging drilling rod, spiral drill and pile machine |
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Effective date of registration: 20230331 Address after: No. 688 Yanchao Road, Henan Street, Yanji City, Yanbian Korean Autonomous Prefecture, Jilin Province, 133000 Patentee after: Jilin Daxing Basic Engineering Technology Co.,Ltd. Address before: Shenyang Drilling Machinery Development Center, No. 11 Hugutai Dagucheng Street, Shenbei New District, Shenyang City, Liaoning Province, 110122 Patentee before: Liu Shoujin Patentee before: Zhang Xicai |
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Effective date of registration: 20240528 Address after: Shenyang Drilling Machinery Development Center, No. 11 Hugutai Dagucheng Street, Shenbei New District, Shenyang City, Liaoning Province, 110122 Patentee after: Liu Shoujin Country or region after: China Patentee after: Zhang Xicai Address before: No. 688 Yanchao Road, Henan Street, Yanji City, Yanbian Korean Autonomous Prefecture, Jilin Province, 133000 Patentee before: Jilin Daxing Basic Engineering Technology Co.,Ltd. Country or region before: China |